Molds & Tooling
4 조회수
TPU Demolding Difficulty
문제 현상
Soft TPU products are difficult to demold, deform during ejection, and undercut designs cannot be demolded
원인 분석
The softness and elasticity of TPU make demolding difficult; small ejector pin area concentrates pressure; undercut designs require elastic deformation for demolding; mold surface texture affects demolding; when troubleshooting on site, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
해결 방법
①Arrange ejector pins with large area and balanced distribution; ②use TPU elasticity to design demoldable undercuts; ③EDM texture on mold surface aids demolding; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
TPU demolding should make good use of its elasticity; large-area ejection plus elastic undercuts is the hard skill for soft materials; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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